Synthesis of Isoxazolines from Nitroalkanes
<i>via</i>
a [4+1]‐Annulation Strategy
作者:Pavel Yu. Ushakov、Elizaveta A. Khatuntseva、Yulia V. Nelyubina、Andrey A. Tabolin、Sema L. Ioffe、Alexey Yu. Sukhorukov
DOI:10.1002/adsc.201901000
日期:2019.12.3
using the [4+1]‐annulation of α‐keto‐stabilized sulfur ylides with N,N‐bis(siloxy)enamines derived from aliphatic nitro compounds. The resulting 5‐keto‐substituted isoxazolines were shown to be convenient precursors of polysubstituted 3‐hydroxypyrrolidines via the one‐pot catalytic N−O hydrogenolysis/intramolecular reductive amination sequence. Application of this approach to the formal synthesis of Merck's